268551689680 has 20 divisors (see below), whose sum is σ = 624382678692. Its totient is φ = 107420675840.

The previous prime is 268551689677. The next prime is 268551689701. The reversal of 268551689680 is 86986155862.

It can be written as a sum of positive squares in 2 ways, for example, as 74031879744 + 194519809936 = 272088^2 + 441044^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1678447981 + ... + 1678448140.

Almost surely, 2^268551689680 is an apocalyptic number.

268551689680 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

268551689680 is an abundant number, since it is smaller than the sum of its proper divisors (355830989012).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

268551689680 is a wasteful number, since it uses less digits than its factorization.

268551689680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3356896134 (or 3356896128 counting only the distinct ones).

The product of its (nonzero) digits is 49766400, while the sum is 64.

The spelling of 268551689680 in words is "two hundred sixty-eight billion, five hundred fifty-one million, six hundred eighty-nine thousand, six hundred eighty".